2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55290This is a résumé of an extensive investigation of some examples in which one obtains the rigid limit of N=2 supergravity by means of an expansion around singular points in the moduli space of a Calabi-Yau 3-fold. We make extensive use of the K3 fibration of the Calabi-Yau manifolds which are considered. At the end the fibration parameter becomes the coordinate of the Riemann surface whose moduli space realises rigid N=2 supersymmetry.6 pages, latex, no figures; To be published in the proceedings of the 31st International Symposium Ahrenshoop on the Theory of Elementary Particles. Buckow, Brandenburg, Germany, sept.2-6, 1997High Energy Physics - Theorytext